Characteristics of Life Reveiw

What is the most basic unit of life?

• cell
• tissue
• organ
• organ system

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A _____ is something in the environment that causes an organism to respond.

• stimulus
• response
• cause
• effect

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Maintaining a stable internal

environment is called

• homeostasis

• equilibrium

• balance

• evenness

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Identify the characteristic: Green plants produce their own food through the process of photosynthesis.

• All living things use energy

• All living things contain cells

• All living things maintain homeostasis

• All living things grow

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Which of the following is NOT a characteristic shared by all living organisms?

• Ability to move
• Ability to grow and develop
• Made up of one or more cells
• Responds to stimuli

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In order for something to be considered a living organism, it must display _____ of the eight characteristics of living things.

• all
• some
• one
• more than half

Organisms, such as bacteria, are ______________ which means they consist of only a single cell.

• unicellular
• multicellular
• autotrophic
• heterotrophic

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Which of the following characteristics of living things best explains why your legs and arms get longer and stronger as you get older?

• You grow and develop.
• You maintain homeostasis.
• Your cells contain genetic information.
• You display organization.

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Living things are based on a universal genetic

code. What molecule is responsible for that code?

• RNA

• Lipid

• Protein

• DNA

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When you step out into the cold, your body shivers in order to keep its temperature at 98.6^oF.

• All living things use energy
• All living things contain cells
• All living things maintain homeostasis
• All living things grow and develop

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